This lot of white serger sewing thread comes with 3 sealed cones of Maxi-Lock brand, each containing 3000 yards. The thread is made of polyester and is perfect for overlocking, sewing, and crafting. The color of the thread is white, making it ideal for use on various materials. The unit of sale is a lot, and the type of thread is an overlocker. This product is great for those who need a reliable and high-quality sewing thread.